/*
 * Copyright (c) 2022-2022 Huawei Technologies Co., Ltd. All rights reserved.
 * Copyright (c) 2022-2022 Huawei Device Co., Ltd. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
 * of conditions and the following disclaimer in the documentation and/or other materials
 * provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
 * to endorse or promote products derived from this software without specific prior written
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#include "It_posix_container.h"
#include <sched.h>
#include <unistd.h>
#include <sys/stat.h>
#include <limits.h>
#include <string>
#include <iostream>
#include <regex>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <signal.h>

#define STACK_SIZE     (1024 * 1024)
#define CONTAINER_TYPE "net"
#define SLEEP_SECONDS 2

static int NewnetChildFun(void *) {
    sleep(SLEEP_SECONDS);
    return 0;
}

static int childFun(void *p)
{
    int ret;
    int fd;
    int childPid;
    int status;
    void *pstk;
    char path[100];

    pstk = malloc(STACK_SIZE);
    ICUNIT_ASSERT_NOT_EQUAL(pstk, NULL, pstk);

    childPid = clone(NewnetChildFun, (char *)pstk + STACK_SIZE, CLONE_NEWNET, NULL);
    ICUNIT_ASSERT_NOT_EQUAL(childPid, -1, childPid);

    auto oldReadLink = readlink_container(getpid(), CONTAINER_TYPE);

    sprintf(path, "/proc/%d/container/net", childPid);
    fd = open(path, O_RDONLY | O_CLOEXEC);
    ICUNIT_ASSERT_NOT_EQUAL(fd, -1, fd);

    ret = setns(fd, CLONE_NEWNET);
    ICUNIT_ASSERT_EQUAL(ret, 0, ret);

    ret = close(fd);
    ICUNIT_ASSERT_EQUAL(ret, 0, ret);

    auto newReadLink = readlink_container(getpid(), CONTAINER_TYPE);

    ret = strcmp(oldReadLink.c_str(), newReadLink.c_str());
    ICUNIT_ASSERT_NOT_EQUAL(ret, 0, ret);

    ret = waitpid(childPid, &status, 0);
    ICUNIT_ASSERT_EQUAL(ret, childPid, ret);

    int exitCode = WEXITSTATUS(status);
    ICUNIT_ASSERT_EQUAL(exitCode, 0, exitCode);

    return 0;
}

static UINT32 Testcase(VOID)
{
    int ret;
    int status;
    int childPid;
    void *pstk;

    pstk = malloc(STACK_SIZE);
    ICUNIT_ASSERT_NOT_EQUAL(pstk, NULL, pstk);

    childPid = clone(childFun, (char *)pstk + STACK_SIZE, CLONE_NEWNET, NULL);
    ICUNIT_ASSERT_NOT_EQUAL(childPid, -1, childPid);

    ret = waitpid(childPid, &status, 0);
    ICUNIT_ASSERT_EQUAL(ret, childPid, ret);

    int exitCode = WEXITSTATUS(status);
    ICUNIT_ASSERT_EQUAL(exitCode, 0, exitCode);

    return 0;
}

VOID ItPosixContainerNet004(void)
{
    TEST_ADD_CASE("IT_POSIX_CONTAINER_NET_004", Testcase, TEST_POSIX, TEST_CONTAINER, TEST_LEVEL0, TEST_FUNCTION);
}
